WO2018018570A1

WO2018018570A1 - Device and method for measuring electrocardiogram

Info

Publication number: WO2018018570A1
Application number: PCT/CN2016/092183
Authority: WO
Inventors: 王昆; 杨楠; 杨胤
Original assignee: 华为技术有限公司
Priority date: 2016-07-29
Filing date: 2016-07-29
Publication date: 2018-02-01
Also published as: CN108601544B; CN108601544A

Abstract

A device (10) and a method for measuring an electrocardiogram. The device (10) comprises: a signal collector (11), an analog-to-digital converter (12), and a wave filter (13). The signal collector (11) is electrically connected to the analog-to-digital converter (12), and the analog-to-digital converter (12) is electrically connected to the wave filter (13). The signal collector (11) is used for acquiring an analog electrocardiogram signal. The analog-to-digital converter (12) is used for converting the analog electrocardiogram signal to a first digital electrocardiogram signal. The wave filter (13) is used for filtering and removing an interfering signal, generated by a circuitry between the signal collector (11) and the wave filter (13), and present in the first digital electrocardiogram signal, to obtain a second digital electrocardiogram signal. The device (10) filters and removes an interference, generated by hardware circuitry, from an electrocardiogram signal, improving the precision of the electrocardiogram signal and allowing electrocardiogram measurement even when using less leads. The device (10) also has a small volume, making home electrocardiogram monitoring feasible and achieving daily healthcare for a family setting.

Description

Apparatus and method for ECG measurement

Technical field

Embodiments of the present invention relate to the field of medical device technology and, more particularly, to an apparatus and method for electrocardiographic measurement.

Background technique

Electrocardiogram (ECG) is an objective indicator of the occurrence, spread and recovery of cardiac excitability. During each cardiac cycle, the heart is excited by the pacemaker, the atria, and the ventricle. With the changes in bioelectricity, various forms of potential changes are extracted from the body surface by electrocardiograph. These figures are ECG.

The tissue and body fluid around the heart are electrically conductive, so the human body can be seen as a volume conductor with a length, width and thickness. The heart is like a power source, and the sum of the action potential changes of numerous cardiomyocytes can be transmitted and reflected to the body surface. There are potential differences between many points on the body surface, and there are many points that are equal to each other.

The measurement of ECG is to obtain the waveform of the electrocardiogram by the voltage difference of the sensor on different parts of the human body surface. In the measurement of existing ECGs, the electrodes, ie the potential sensors, are placed in various parts of the chest and/or limbs, leading to various digital combinations from the ECG electrodes. In the clinical setting, the 12-lead ECG is the most common setting. The 12-lead ECG includes three standard limb leads and six pre-cardiac lead. In hospital physical examination, often by the right arm, left arm and left leg. The lead consists of three steps.

In the measurement of the existing ECG, there are many leads for detecting the ECG, which results in a large volume of the detection device and high power consumption, and basically belongs to a hospital-specific device. The user must go to the hospital with the above device to perform electrocardiogram detection, which brings inconvenience to the user.

Summary of the invention

The present application provides an apparatus and method for electrocardiographic measurement, which performs filtering processing on a digital electrocardiographic signal converted into an analog electrocardiographic signal, filters out interference signals brought by a hardware link, and improves signal accuracy. Therefore, the electrocardiogram measurement can be successfully realized even in the case of a small number of leads, thereby making the device have a small volume, allowing the electrocardiogram measurement to enter an ordinary household, and bringing daily home care to the home user.

In a first aspect, a device for electrocardiographic measurement is provided, the device comprising: a signal collector, an analog to digital converter and a filter, the signal collector being electrically connected to the analog to digital converter, the analog to digital conversion The device is electrically connected to the filter; wherein the signal collector is configured to acquire an analog ECG signal; the analog to digital converter is configured to convert the analog ECG signal into a first digital ECG signal; the filter And filtering the interference signal caused by the link existing in the first digital ECG signal to obtain a second digital ECG signal, where the link is a link between the signal collector and the filter.

Therefore, the apparatus for electrocardiographic measurement according to the embodiment of the present invention filters the digital electrocardiographic signal converted into the simulated analog electrocardiographic signal, filters out the interference signal brought by the hardware link, and improves the accuracy of the signal. The degree of ECG measurement can be successfully achieved even in the case of a small number of leads, thereby enabling the device to have a small volume, enabling ECG measurement to enter an ordinary household, and bringing daily home care to the home user.

In conjunction with the first aspect, in a first possible implementation of the first aspect, the filter is a matched filter, and the filter coefficient of the filter is based on the first reference signal transmitted at a position of the signal collector, The functional relationship between the second reference signal generated by the first signal received at the location of the filter and the least squares method are determined.

That is to say, when designing the filter, a reference signal can be transmitted at the position of the signal collector, and the reference signal passes through the signal collector and the analog-to-digital converter to reach the position of the filter, and is subjected to the signal collector and the filter. The interference of the link between the devices receives the reference signal at the beginning of the circuit of the filter, and the relationship between the received reference signal and the transmitted reference signal can be described by a functional relationship, according to this functional relationship and the minimum two Multiplication can obtain the filter coefficient that maximizes the signal-to-noise ratio of the reference signal when filtering the reference signal.

Optionally, the second digital ECG signal is passed through a low-pass filter to filter out interference signals such as myoelectric signals and respiratory signals in the second digital ECG signal.

Alternatively, the first digital ECG signal may be first passed through a low-pass filter to filter out the interference signals such as the EMG signal and the respiratory signal in the first digital ECG signal, and then the digital ECG obtained after passing through the low-pass filter. The signal is further filtered to filter out interference signals from the hardware link.

In conjunction with the first possible implementation of the first aspect, in a second possible implementation of the first aspect, the matched filter includes N-1 delay registers, N multipliers, and N adders; The N-1 delay registers are sequentially connected in series, and the input end of the matched filter is coupled to the input end of the first delay register and the input end of the first multiplier, respectively, and the output end of the i-th delay register is coupled To the input of the i+1th multiplier, the output of the i-th multiplier is coupled to the input of the i-th adder, the N adders are connected in series, and the output of the Nth adder matches the An output of the filter is coupled; wherein the first digital ECG signal is from the matched filter Input input, the signal output by the matched filter is the second digital ECG signal; i is 1, 2...N-1, and N is a positive integer greater than 1.

With reference to the first aspect, or the first possible implementation manner or the second possible implementation manner of the first aspect, in a third possible implementation manner of the first aspect, the signal collector includes a first potential sensor and And a second potential sensor, the signal collector is configured to: acquire the simulated ECG signal by sensing the potential difference change between the first position and the second position by the first potential sensor and the second potential sensor.

That is to say, the apparatus for electrocardiographic measurement of the embodiment of the present invention only needs two potential sensors to acquire the electrocardiographic signal, and the device of the electrocardiographic measurement in the prior art uses less potential sensors, so that the device The volume can be smaller, easy to use and carry.

With reference to the first aspect, any one of the first to third possible implementations of the first aspect, in a fourth possible implementation of the first aspect, the apparatus further includes a signal amplifier, The signal amplifier is electrically connected to the signal collector and the analog-to-digital converter; the signal amplifier is configured to amplify the analog electrocardiographic signal to obtain an amplified analog electrocardiogram signal; wherein the analog-to-digital converter Specifically, the method is: converting the amplified analog electrocardiographic signal into a first digital electrocardiographic signal.

With reference to the first aspect, any one of the possible implementations of the first to fourth possible implementations of the first aspect, in a fifth possible implementation of the first aspect, the device further includes a memory, the memory The signal collector, the analog to digital converter and the filter are electrically connected; the memory is configured to store the analog ECG signal, the first digital ECG signal and the second digital ECG signal.

With reference to the first aspect, any one of the possible implementations of the first to fifth possible implementations of the first aspect, in a sixth possible implementation of the first aspect, the device further includes a display; the display And for presenting to the user an electrocardiogram waveform corresponding to the second digital ECG signal.

With reference to the first aspect, any one of the possible implementations of the first to fifth possible implementations of the first aspect, in a seventh possible implementation of the first aspect, the device further includes a Bluetooth module, The Bluetooth module is electrically connected to the filter; the Bluetooth module is configured to transmit the second digital ECG signal to the mobile terminal by using a Bluetooth protocol, so that the mobile terminal stores the second digital ECG signal and presents the signal to the user The ECG waveform corresponding to the second digital ECG signal.

Therefore, the ECG signal can be saved and analyzed by the mobile terminal, which can reduce the complexity of the ECG measuring device.

In combination with the first aspect, any of the first to fifth possible implementations of the first aspect is possible In an eighth implementation manner of the first aspect, the device includes a universal serial bus USB module, and the USB module is electrically connected to the filter; the USB module is configured according to a USB connection protocol The second digital ECG signal is output to the mobile terminal, so that the mobile terminal stores the second digital ECG signal and presents the ECG waveform corresponding to the second digital ECG signal to the user.

In conjunction with the third possible implementation of the first aspect, in a ninth possible implementation of the first aspect, the device is a weight scale, the weight meter further comprising a housing, the first potential sensor is located in the housing At a position on the surface corresponding to the left foot of the subject, the second potential sensor is located at a position on the surface of the housing corresponding to the right foot of the subject.

In a second aspect, a method for electrocardiographic measurement is provided, the method being performed by the apparatus of any of the first aspect or the first aspect of the first aspect.

In a third aspect, a computer readable medium is provided for storing a computer program, the computer program comprising instructions for performing the method of the second aspect.

DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings to be used in the embodiments of the present invention will be briefly described below. It is obvious that the drawings described below are only some embodiments of the present invention, Those skilled in the art can also obtain other drawings based on these drawings without paying any creative work.

1 is a schematic block diagram of an apparatus for electrocardiographic measurement according to an embodiment of the present invention;

2 is a schematic diagram of a circuit of a matched filter in accordance with an embodiment of the present invention;

3 is another schematic block diagram of an apparatus for electrocardiographic measurement in accordance with an embodiment of the present invention;

4 is still another schematic block diagram of an apparatus for electrocardiographic measurement according to an embodiment of the present invention;

FIG. 5 is still another schematic block diagram of an apparatus for electrocardiographic measurement according to an embodiment of the present invention; FIG.

6 is still another schematic block diagram of an apparatus for electrocardiographic measurement according to an embodiment of the present invention;

Figure 7 is a schematic illustration of a weight scale in accordance with an embodiment of the present invention;

8 is a schematic flow chart of a method for electrocardiographic measurement in accordance with an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are a part of the embodiments of the present invention, and It is all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of the present invention.

In order to facilitate the understanding of the embodiments of the present invention, the principle of electrocardiographic measurement is first introduced here. Before the mechanical contraction, the heart first produces electrical excitation, which generates bioelectric current. Since the tissue and body fluid around the heart can conduct electricity, the bioelectric current will be transmitted to the body surface through tissues and body fluids, and different potential changes will be generated in different parts of the body. The two potential sensors are in contact with the two parts of the body surface, and can be used to sense the change of the potential difference between the two parts. The dynamic curve formed by recording the change of the potential difference is an electrocardiogram (Electrocardiogram, referred to as "ECG").

It is to be understood that, in the embodiment of the present invention, the potential sensor may also be referred to as an "electrode" or an "electrocardiographic electrode", and the currently used Ag/AgCl electrode may be used, which is not limited in the present invention.

1 shows an apparatus for electrocardiographic measurement according to an embodiment of the present invention. As shown in FIG. 1, the apparatus 10 includes a signal collector 11, an analog to digital converter 12, and a filter 13, the analog to digital converter 12 The signal collector 11 is electrically connected, and the filter 13 is electrically connected to the analog-to-digital converter 12:

The signal collector 11 is configured to acquire an analog ECG signal;

The analog to digital converter 12 is configured to convert the analog ECG signal into a first digital ECG signal;

The filter 13 is configured to filter out an interference signal caused by the link existing in the first digital ECG signal to obtain a second digital ECG signal, where the link is the signal collector 11 and the filter 13 The link between.

Generally, the analog ECG signal acquired by the signal collector 11 is very weak, usually on the order of microvolts to millivolts. In order to facilitate the drawing of the ECG waveform, the ECG signal needs to be amplified, as shown in FIG. The device 10 further includes a signal amplifier 14 electrically connected to the signal collector 11 and the analog-to-digital converter 12 for amplifying the analog ECG signal acquired by the signal collector 11 to obtain an amplified process. Simulate ECG signals.

And further, as shown in FIG. 1, the device 10 further includes a memory 15 for storing the analog ECG signal acquired by the signal collector 11, the first digital ECG signal, and the second digital ECG signal.

Optionally, as an example, the filter 13 is a matched filter, and the circuit of the matched filter is as shown in FIG. 2. The matched filter shown in FIG. 2 includes N-1 delay registers, N multipliers, and N. Adder, X(n)-X(n-N+1) in Fig. 2 represents a digital ECG signal, and h(0)-h(N-1) represents the filter coefficient of the matched filter.

Represents a multiplier,

Indicates the adder, Z ^-1 represents the delay register, and Y(n) represents the digital ECG signal output after filtering by the matched filter.

Specifically, the N-1 delay registers are sequentially connected in series, and the input end of the matched filter is coupled to the input end of the first delay register and the input end of the first multiplier, respectively, and the output of the i th delay register The end is coupled to the input of the i+1th multiplier, the output of the i th multiplier is coupled to the input of the i th adder, the N adders are connected in series, and the output of the Nth adder is An output of the matched filter is coupled; wherein the first digital ECG signal is input from an input end of the matched filter, and the signal output by the matched filter is the second digital ECG signal; i is 1, 2 ...N-1, N is a positive integer greater than one. That is, the output signal Y(n) in Fig. 2 can be expressed as: Y(n)=x(n)*h(0)+x(n-1)*h1+...+X(n-N+ 1) *h(N-1).

It is to be understood that the matched filter in FIG. 2 is only an example. The matched filter in the embodiment of the present invention may also be other types of matched filters in the prior art, and will not be described in detail herein.

Usually, after the circuit design is completed, it is fixed. Therefore, when designing the matched filter, it is necessary to determine the filter coefficient of the matched filter. The specific method may be to transmit a relatively high reference signal R1 at the signal collector 11 at The reference signal S1 generated by the reference signal R1 is acquired at the beginning of the circuit of the matched filter, and the functional relationship between S1 and R1 is usually expressed as equation (1):

S1=H*R1 (1)

Where H represents the channel parameter matrix at the beginning of the circuit from the signal collector 11 to the matched filter.

Further, the filter coefficients can be obtained according to the formulas (1)-(3) and the least squares method:

H ^* =INV(A1 ^T *A1)*A1 ^T *S1 (2)

H ^* *H=1 (3)

In the formula (2), H ^* represents the inverse matrix of H, the elements in H ^* are the filter coefficients, INV() represents the inverse operation of the matrix, and A1 is the covariance obtained by processing the acquired reference signal S1. Matrix, A1 ^T represents the transposed matrix of A1.

After the matched filter filtering process, at the end of the circuit of the matched filter, the received signal S' can be expressed as equation (4):

S'=R1*H*H ^* (4)

It can be seen that the signal received at the end of the circuit of the matched filter is the original reference signal, whereby the first digital ECG signal is filtered by the matched filter, and the collected ECG can be obtained theoretically without loss. Signal, in the actual application scenario, can get ECG with high signal to noise ratio signal.

It should be noted that the form of the filter in the embodiment of the present invention is not limited to the linear filter, and may be a non-linear filter of other forms. The method for determining the filter coefficient by transmitting the reference signal as described above is also the same. Determination of the filter coefficients for a nonlinear filter.

Further, the simulated electrocardiographic signal acquired by the signal collector 11 may further include an interference signal such as a myoelectric signal and a respiratory signal of the human body, so an ordinary filter circuit (low pass) may be added after the matched filter. Filter circuit), filtering out interference signals such as myoelectric signals and respiratory signals.

Moreover, the wavelet denoising process can be performed on the digital electrocardiographic signal after the filter 13. The implementation of the specific wavelet denoising can be selected according to actual needs, which is not limited by the present invention.

Optionally, as an example, as shown in FIG. 3, the signal collector 11 includes a first potential sensor 111 and a second potential sensor 112, and the signal collector 11 specifically passes through the first potential sensor 111 and the second potential sensor 112. A change in the potential difference between the first position and the second position is measured to obtain an analog ECG signal.

Optionally, as an example, as shown in FIG. 4, the device 10 may further include an audio circuit 16 and a speaker 161. The audio circuit 16 is electrically connected to the signal collector 11, and the audio circuit 16 may convert the received audio data. The electrical signal is transmitted to the speaker 161 and converted into a sound signal output by the speaker 161, whereby the device 10 can inform the testee of the success or failure of the electrocardiogram by voice prompting, for example, if the signal collector 11 successfully acquires the subject The electrocardiographic signal, the speaker 161 can emit a "successful measurement" prompt sound, if the signal collector 11 does not successfully acquire the electrocardiographic signal of the test subject, the speaker 161 can issue a "measurement failed, please re-measure" prompt tone, The subject can judge whether the measurement is successful according to the prompt tone.

Optionally, as an example, as shown in FIG. 5, the device 10 further includes a display 17. The display 17 is electrically connected to the signal collector 11 and the filter 13. The display 17 can be a liquid crystal display (referred to as a liquid crystal display). LCD"), the display 17 is provided with a measurement prompt light 171 (which may be a light-emitting diode). When the signal collector 11 successfully acquires the electrocardiographic signal of the test subject, the measurement prompt light 171 is illuminated to inform the measured person that the signal is successfully collected. The person being measured can stop contact with the device 10. If the signal collector 11 has not successfully acquired the ECG signal of the measured person when the subject stops contacting the device 10, the measurement indicator 171 issues a warning signal (for example, the measurement indicator lamp 171 is always in a flashing state). The prompting person is re-contacted with the device 10 to complete the measurement.

Alternatively, when the subject is in contact with the device 10, the measurement time countdown starts to be displayed on the display 17, for example, if the signal collector 11 successfully acquires the electrocardiographic signal of the subject, it takes 5 seconds, when the subject contacts the device 10. At the same time, the display 17 counts down from 5, and when the displayed number is 0, it indicates that the signal collector 11 has successfully acquired the ECG signal of the subject.

Further, the display 17 is further configured to present to the user an electrocardiographic waveform corresponding to the second digital electrocardiographic signal.

FIG. 6 shows still another schematic block diagram of a device 10 according to an embodiment of the present invention. As shown in FIG. 6, the device 10 further includes: a Bluetooth module 18. Therefore, the device 10 can be paired with the mobile terminal through the Bluetooth module 18, and the mobile terminal can be a smart phone, a tablet computer or a notebook computer. After the device 10 is connected to the mobile terminal, the second digital ECG signal is transmitted to the mobile terminal through the Bluetooth module 18, the mobile terminal stores the second digital ECG signal, and the second digital ECG signal is analyzed by professional software. An electrocardiographic waveform is generated based on the second digital electrocardiographic signal, and the electrocardiographic waveform is displayed on a display screen. The standard ECG waveform can be stored in advance in the mobile terminal. After the ECG waveform is generated by the mobile terminal, the generated ECG waveform is compared with the standard ECG waveform, and the health condition of the test subject is judged according to the comparison result.

Optionally, as an example, as shown in FIG. 6, the device 10 further includes: a serial bus (Universal Serial Bus, "USB") module 19, and the device 10 can communicate with the mobile terminal according to the USB connection protocol through the USB module 19. A connection is made to transmit a second digital ECG signal to the mobile terminal, so that the mobile terminal processes the received digital ECG signal.

It will be understood by those skilled in the art that the structure of the device 10 illustrated in Figures 1 to 6 does not constitute a limitation to the device 10, may include more or fewer components than those illustrated, or may combine certain components, or different Parts layout. For example, device 10 may also include a power source, a Wireless Fidelity ("WiFi") module, etc. for powering various components of device 10.

As a specific example, the device 10 is the scale shown in FIG. 7, the scale includes a housing, the first potential sensor 111 is located at the left foot position on the housing, and the second potential sensor 112 is located on the right foot of the housing. At the position, when the test subject's feet stand at the corresponding position of the weight scale, the weight scale starts the measurement, and the first potential sensor 111 and the second potential sensor 112 sense the change of the potential difference between the feet of the testee. The ECG signal of the subject. Alternatively, the device 10 is provided with a measurement start switch. When the testee's feet stand at the corresponding position of the device 10, the test subject manually opens the measurement switch on the body device 10 to start measuring the ECG signal of the test subject. It can be understood that if the device 10 is not a weight scale, the positions of the first potential sensor 111 and the second potential sensor 112 can be Place it in any position that is convenient for contact with the subject's body.

Optionally, as shown in FIG. 7 , the weight scale may further include a display 17 on which the measurement prompt light 171 is disposed, and the specific working method of the display 17 and the measurement indicator light 171 is the same as described above. No longer.

The apparatus for electrocardiographic measurement according to an embodiment of the present invention is described in detail above with reference to FIGS. 1 through 7, and the apparatus 10 for electrocardiographic measurement described above may perform the following method 1000 for electrocardiographic measurement, as shown in FIG. , method 1000 includes:

S1100, obtaining an analog ECG signal;

S1200, converting the analog ECG signal into a first digital ECG signal;

S1300, filtering out an interference signal caused by the link existing in the first digital ECG signal to obtain a second digital ECG signal, where the link is to obtain a position of the analog ECG signal and filter the first digit The link between the locations of the interfering signals present by the link present in the ECG signal.

In the embodiment of the present invention, optionally, filtering the interference signal caused by the link existing in the first digital ECG signal includes: filtering the first digital ECG signal by using a matched filter An interference signal brought by the link, the filter coefficient of the matched filter is received by the first reference signal transmitted at a position of the analog ECG signal, at the position of the matched filter A functional relationship between a second reference signal produced by a signal and a least squares method.

In an embodiment of the present invention, optionally, the matched filter includes N-1 delay registers, N multipliers, and N adders; wherein the N-1 delay registers are sequentially connected in series, and the matched filter is The input end is coupled to the input of the first delay register and the input of the first multiplier, respectively, and the output of the i th delay register is coupled to the input of the i+1th multiplier, the ith multiplication The output of the device is coupled to the input of the i-th adder, the N adders are connected in series, and the output of the Nth adder is coupled to the output of the matched filter; wherein the first digital electrocardiogram A signal is input from an input of the matched filter, and the signal output by the matched filter is the second digital ECG signal; i is 1, 2...N-1, and N is a positive integer greater than one.

In the embodiment of the present invention, optionally, the S1100 is specifically configured to: acquire the simulated ECG signal by sensing a change in a potential difference between the first location and the second location.

In an embodiment of the present invention, optionally, the method further includes: performing amplification processing on the analog ECG signal to obtain an analog ECG signal after the amplification process;

The S1200 is specifically configured to: convert the amplified analog electrocardiographic signal into a first digital electrocardiographic signal.

In an embodiment of the present invention, optionally, the method further includes: storing the analog ECG signal, the first digital ECG signal, and the second digital ECG signal.

In an embodiment of the present invention, optionally, the method further includes: presenting, to the user, an ECG waveform corresponding to the second digital ECG signal.

In the embodiment of the present invention, optionally, the presenting the ECG waveform corresponding to the second digital signal to the user may be: transmitting the second digital ECG signal to the mobile terminal by using a Bluetooth protocol, so that the mobile terminal stores the And a second digital ECG signal, and presenting to the user an ECG waveform corresponding to the second digital ECG signal.

In the embodiment of the present invention, optionally, the presenting the ECG waveform corresponding to the second digital signal to the user may be: outputting the second digital ECG signal to the mobile terminal according to the universal serial bus USB connection protocol, so as to facilitate The mobile terminal stores the second digital ECG signal and presents the user with an ECG waveform corresponding to the second digital ECG signal.

Therefore, according to the method for electrocardiographic measurement according to the embodiment of the invention, the digital electrocardiographic signal converted into the simulated analog electrocardiographic signal is filtered, the interference signal brought by the hardware link is filtered out, and the signal is improved. The degree of ECG measurement can be successfully achieved even in the case of a small number of leads, thereby enabling the device to have a small volume, enabling ECG measurement to enter an ordinary household, and bringing daily home care to the home user.

Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the various examples described in connection with the embodiments disclosed herein can be implemented in electronic hardware or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods for implementing the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present invention.

A person skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the system, the device and the unit described above can refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.

In the several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be indirect coupling through some interface, device or unit. Or a communication connection, which may be in electrical, mechanical or other form.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

The functions may be stored in a computer readable storage medium if implemented in the form of a software functional unit and sold or used as a standalone product. Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, or a part of the technical solution, may be embodied in the form of a software product, which is stored in a storage medium, including The instructions are used to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like. .

The above is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the claims.

Claims

An apparatus for electrocardiographic measurement, the apparatus comprising: a signal collector, an analog to digital converter, and a filter, the signal collector being electrically connected to the analog to digital converter, the module a digital converter electrically connected to the filter;

The signal collector is configured to acquire an analog ECG signal;

The analog to digital converter is configured to convert the analog ECG signal into a first digital ECG signal;

The filter is configured to filter out an interference signal caused by the link existing in the first digital ECG signal to obtain a second digital ECG signal, where the link is the signal collector and the The link between the filters.
The apparatus of claim 1 wherein said filter is a matched filter, said filter coefficients of said filter being based on a first reference signal transmitted at a location of said signal collector, said A functional relationship between the second reference signal generated by the first signal received at the location of the filter and a least squares method is determined.
The apparatus according to claim 2, wherein said matched filter comprises N-1 delay registers, N multipliers, and N adders;

The N-1 delay registers are sequentially connected in series, and the input ends of the matched filters are respectively coupled to the input ends of the first delay register and the input end of the first multiplier, and the i-th delay register is The output is coupled to the input of the i+1th multiplier, the output of the i-th multiplier being coupled to the input of the i-th adder, the N adders being connected in series, the output of the Nth adder An end coupled to an output of the matched filter;

The first digital electrocardiographic signal is input from an input end of the matched filter, and the signal output by the matched filter is the second digital electrocardiographic signal;

i is 1, 2...N-1, and N is a positive integer greater than one.
The apparatus according to any one of claims 1 to 3, wherein the signal collector comprises a first potential sensor and a second potential sensor, the signal collector being specifically configured to:

The simulated electrocardiographic signal is acquired by the first potential sensor and the second potential sensor sensing a change in potential difference between the first position and the second position.
The apparatus according to any one of claims 1 to 4, further comprising a signal amplifier, the signal amplifier being electrically connected to the signal collector and the analog to digital converter;

The signal amplifier is configured to amplify the analog electrocardiographic signal to obtain an amplification Simulated ECG signal;

The analog-to-digital converter is specifically configured to: convert the amplified analog electrocardiographic signal into a first digital electrocardiographic signal.
Apparatus according to any one of claims 1 to 5, further comprising a memory electrically coupled to said signal collector, said analog to digital converter and said filter ;

The memory is configured to store the analog ECG signal, the first digital ECG signal, and the second digital ECG signal.
Apparatus according to any one of claims 1 to 6 wherein said apparatus further comprises a display;

The display is configured to present to the user an electrocardiographic waveform corresponding to the second digital electrocardiographic signal.
The device according to any one of claims 1 to 6, wherein the device further comprises a Bluetooth module, and the Bluetooth module is electrically connected to the filter;

The Bluetooth module is configured to transmit the second digital ECG signal to the mobile terminal by using a Bluetooth protocol, so that the mobile terminal stores the second digital ECG signal and presents the second digital heart to a user The ECG waveform corresponding to the electrical signal.
The device according to any one of claims 1 to 6, wherein the device comprises a universal serial bus USB module, and the USB module is electrically connected to the filter;

The USB module is configured to output the second digital ECG signal to the mobile terminal according to a USB connection protocol, so that the mobile terminal stores the second digital ECG signal and presents the second number to a user The ECG waveform corresponding to the ECG signal.
The device according to claim 4, wherein said device is a weight scale, said weight scale further comprising a housing, said first potential sensor being located on a surface of said housing and a left foot of said subject At a corresponding position, the second potential sensor is located at a position on the surface of the housing corresponding to the right foot of the subject.
A method for electrocardiographic measurement, the method comprising:

Acquire an analog ECG signal;

Converting the analog ECG signal into a first digital ECG signal;

Filtering an interference signal caused by the link existing in the first digital ECG signal to obtain a second digital ECG signal, where the link is a position for acquiring the analog ECG signal and filtering the first A link between the locations of the interfering signals present by the link present in a digital ECG signal.
The method according to claim 11, wherein the filtering out the interference signal caused by the link existing in the first digital ECG signal comprises:

And filtering, by using a matched filter, an interference signal caused by the link existing in the first digital electrocardiographic signal, where a filter coefficient of the matched filter is transmitted according to a position at which the analog ECG signal is acquired A reference signal, a functional relationship between the second reference signal generated by the first signal received at the location of the matched filter, and a least squares method.